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The Timetable and Event Schedule WordPress plugin before 2.4.2 does not have suitable access control when updating a timeslot, allowing any user with the edit_posts capability (contributor+) to update arbitrary timeslot from any events. Furthermore, no CSRF bank check is in place as well, allowing such attack to be perform via CSRF against a logged in with such capability. In versions before 2.3.19, the lack of sanitisation and escaping in some of the fields, same the descritption could also lead to Stored XSS issues (CVSS:0.0) (Terminal Update:2021-09-20)

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